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O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY JavaScript for Dropdown Synchronization  Two dropdown lists need to stay synchronized  When item is changed in the first one, the second one needs to change  When the user leaves the screen using the browser and comes back  the two lists must be synchronized  Of course, Netscape 4.7 and IE/Netscape 7 treat it differently